Asphalt-cutting machine.



5 SHEETS-SHEET 1.

PATENTBD APR. 4, 1905.

APPLICATION FILED 00T.14, 1904.

H SCHUMACHEB ASPHALT CUTTING MACHINE.

`m m Ww LN@ www M mi .Il

PATENTED APR. 4, 1905.

H.- SGHUMAGHER. ASPHALT CUTTING MACHINE.

APPLICATION FILED 0CT.14, 1904. I

6 SHEETS-SHEET 2.

Wzrzesses x No. 786,522. PATENTED APR. 4, 1905.

v H. SGHUMAGHER. ASPHALT CUTTING MACHINE.

APPLICATION FILED 00T.14, 1904.

5 SHEETS-SHEET 3.

No. 786,522. P ATBNTED APR. 4, 1905.

- H. SGHUMAGHER; v

ASPHALT CUTTING MACHINE.

APPLIGATION FILED 00114, 1904.

5 SHEETS-SHEET 4.

PATENTED APRA, 1905. H. SGHUMAGHER.

ASPHALT CUTTING MAHINE.

APPLIOATION FILED 00T.14, 1904.

' 5 SHEETS-SHEET 5.

IHlIIIIIHH #lllillillllllllllllllll IillllllllllllllIIIIIIIHHIIHIIWUNITED STATES Patented April 4, 1905.

HENRY SOHUMAOHER, OF BUFFALO, NEW YORK.

ASPHALT-CUTTING MACHINE.I

SPECIFICATION forming part of Letters Patent No. 786,522, dated Apr14,1905.

l Application 'filed October 14, 1904. Serial No. 228,1284.

To all whom, it may colto/7%.-

falo, in the county of Erie and State of New` York, have invented newand useful Improvements in Asphalt-Cutting Machines, of which thefollowing is a specification.

This invention relates more particularly to a machine for cuttingasphalt pavement in repairing the same, but is also applicable tosimilar apparatus, such as road-machines.

The principal object of my invention is to provide an asphaltcuttingmachine which permits the cutters to. be moved laterally as well asforwardly and backwardly in order to cut out pieces of different formsor outlines, according to the required repairs.

Further objects of my invention are to provide simple means for varyingthe stroke of the cutters and compensating for their wear and to improvethe construction of themachine in other respects.

In the accompanying drawings, consisting of live sheets, Figure 1 is aside elevation of my improved machine. Fig. 2 is a sectional elevationthereof. Fig. 3 is an enlarged side elevation of one of theshaft-standards, showing the eccentric-adjusting means of the shaft.Fig. 4 is a top plan view of the machine. Fig. 5 is a sectionalelevation of one of the helves and its actuating mechanism. Fig. 6 is ahorizontal section in line 6 6, Fig. 5. Fig. 7 is a transverse verticalsection in line 7 7, Fig. 5. Fig. 8 is a cross-section of the helve inline 8 8, Fig. 5. Fig. 9 is a longitudinal section thereof in line 9 9,Fig. 8. Fig. 10 is a transverse vertical section in line 10 10, Fig. 5.Fig. 11 is a fragmentary horizontal section of the adjustable eccentricof one of the helves. Fig. 12 is a vertical section in line 12 12, Fig.10, looking toward the right; and Fig. 13 is a section on the same linelooking toward the left. Fig. 14- is a vertical section in line 14 14,Fig. 10, looking toward the leftg and 'Fig'. 15 is a section on the sameline looking toward the right. Fig. 16 is acrosssectionfof'oneof thecutters in line 16 1li,`

Fig.5;ff- "y Siniilarfletters of reference indicate rcorrespondingparts' throughout the several views.

rplatform and the rear wheels A3 are fastened thereto. Thehorizontally-swinging spindles of the steering-wheels are provided witharms a, which are connected by links a' with a transversely-slidingrack-bar B, guided on lthe front portion of the platform A. As

shown in Figs. 1 and 2, this rack-bar is operated by an uprightsteering-spindle B/ through the medium of a longitudinal shaft journaledon the under side of the platform, and connected with said shaft bybevel-gears b 212 and provided at its front end with a gearwheel Z13,which meshes with the rack-bar.

lO indicates a horizontal turn-table supported upon the platform A androtating upon a fixed Stud or post C', rising from the platform.

D is a suitable motor, such as a gas-engine, mounted on the turn tablenear one side thereof and adapted to propel the vehicle and actuate thecutters and other parts of the machine.

E is a counter-shaft mounted on the turntable C between the motor-shaftand the rear axle A and to which motion is transmitted by any suitablemeans, such as straight and crossed belts e c', running around a widepulley @2 on the motor-shaft and tight and loose pulleys e3 e* on thecounter-shaft, so that by shifting one or the other of said belts uponits corresponding tight pulleys the counter-shaft is turned forward orbackward. Motion may be transmitted from the counter-shaft to the rearaxle by a belt e5 and pulleys e6 @7. The machine can by this means bepropelled forward or backward, the driving means just described beingintended more especially for transporting. the machine. ln addition tothis main propelling mechanism the machine is provid ed with anauxiliary propelling mechanifsm for'slowly advancing itwhile the cuttersare in action. This auxiliary mechanism preferably consists of a wormf', secured to IOO the counter-shaft E and meshing with a worm- Wheelf', journaled on the reduced upper end of the post C' and carrying asprocket-wheel f2. Motion is transmitted from the latter to the rearaxle by a chain F, running around said sprocket-wheel, and a similarwheel F, secured to the rear axle, as shown in Figs. 1 and 4. In orderto permit the slow-propelling mechanism to be thrown out of gear withthe motor when it is desired to use the main propelling mechanism, thecounter-shaft Eis journaled yin eccentric bearing-boxes es capable ofturning in circular openings in the standards e, which support theshaft, as best shown in Fig. 3. The two eccentric-boxes of the shaft areconnected by a tie-bar @10, having a handle e, by which construction theboxes can be turned simultaneously for shifting the wormf into and outof gear with the worm-wheel f in an obvious manner. When theslow-propelling mechanism is employed, the transmission-belt e is thrownof its pulleys.

The turn-table C may be actuated by any suitable means; but this ispreferably accomplished by the following mechanism shown in thedrawings: G is a fixed horizontal worm wheel or sector secured to thepost C, and g is a transverse shaft mounted on the tu rn-table andcarrying a worm g, which meshes with said sector, so that the rotationof the shaft in one or the other direction causes the worm to traveltoward one end of the sector, thereby rotating the turn-tableaccordingly. The worm-shaft g is driven from a counter-shaft g2 bystraight and crossed belts g3 y", running around a pulley g5 on saidcounter-shaft and tight and loose pulleys g g7 on said worm-l shaft. Theinnermost and outermost of the last-named pulleys are fast on the shaft,and the two intermediate ones are loose, so that upon shifting bothbelts onto the loose pulleys the turn-table is left at rest, while uponshifting either of the belts upon its respective tight pulley theturn-table is rotated in the correspondingdirection. Motion istransmitted from the motor-shaft to the counter-shaft g2 by suitablegearing 08. This counter-shaft is journaled in standards H, mounted onthe turn-table. The latter has a curved sloti'for the passage of thesteering-spindle B,.\vhich slot is concentric with the post C'. Bymounting both the table-turning shaft g and its driving or counter shaftg2 on the turn-table they maintain the same parallel relation in allpositions of the table, preventing the drivingbelts from running off thepulleys, which would be liable to occur if one of these shafts weremounted on the frame of the machine and the other on the table.

J J indicate the cutters or other tools adapted to operate upon the roador pavement, two of such cutters being shown in the drawings, although agreater or less number may be employed, if desired. These cutters arear- -which is constructed as follows: The rear end of the helve isseated in a sleeve or socket It, provided at its sides with trunnions1', which are supported in bearing-boxes f, mounted in the standards H.The helve is clamped in the sleeve 7o by bolts 7c3, which preferablybear against the top, sides, and the upper corners thereof, as shown inFigs. 8 and 9. The interior of this sleeve is preferably somewhat largerthan the helve, so that by slackening the clamping-bolts k3 on one sideof the sleeve. and tightening those on the opposite side the helve mayadjusted laterally at a greater or n less angle to the axis of thesleeve for varying the distance between the cutters. This is a desirablefeature, for instance, for cutting out a strip of asphalt pavement of asuitable width to form atrench for the conduits of electric cables. Thebearing-boxes of the helve are preferably made vertically adjustable toenable the fulcrum of the helve to be raised or lowered for causing thecutters to penetrate the asphalt with a straight cut, a forward cut, oran under cut, as desired, and also to compensate for the wear of thecutters or other tools. For this purpose the bearingboxes are guided invertical slots in the sides of the standards and provided with uprightad justing-screws Z, which are swiveled to the boxes at their lowerends, as shown in Fig. 7, while their upper portions engage inscrewthreaded openings formed in the adjacent portions of the standards.These screws are provided at their upper ends with gear-wheels Z ofuniform diameter and caused to turn simultaneously and uniformly by anintermediate idler or gear pinion Z2, meshing with both of saidgear-wheels. One of the adjusting-screws has a square upper end Z3,adapted to receive a hand-crank (not shown) for turning the screws toadjust the bearings. In order to permit the gear-pinion Z2 to follow thevertical movements of the adjusting-screws, the same has aninternally-screw-threaded hub which engages with a threaded arbor Zi,mounted on a cross-bar at the top of the standards. M is avertically-movable actuatingyoke which is arranged in front of thesleeve Zt' and through which the helve passes. This yoke is carried byrearwardly-extending arms or side frames N pivoted at their rear endsupon the helve-trunnions/t". Motion is transmitted from the yoke to thehelve by buffers or cushions m, of rubber or other suitable material,interposed between the yoke and the upper and lower sides of the helve.These buffers are IOO IIC

preferably seated between cups m', attached to the upper and lowercross-bars of the yoke, and socketed plates m2, secured to the upper andlower sides of the helve. A vibrating motion is imparted to the yoke byany suitable means; but I prefer to employ for this purpose an eccentricN and a surrounding-strap n, which latter is connected with the bottomof the yoke by a rod a'. In the preferred construction shown in thedrawings the eccentric is loose on the shaft gzand coupled thereto atwill by a laterally-sliding clutch head or member n2, splined to theshaft, as shown in Figs. l and 18, and provided on its inner side withteeth a3, adapted to interlock with corresponding teeth ai on theopposing side of the eccentric for clutching the latter toits shaft.These teeth are arranged lat or near the periphery of the clutch-headand the eccentric, so as to transmit power to the eccentric near itsedge and obtain the most favorable driving leverage. This clutch-head isnormally held in engagement with the eccentric by an elbowlever o, onearm of which carries a yoke 0', having shoes 02, which engage in anannular groove of the clutch-head, while the other arm of said lever isconnected with a sliding rod o3, which is constantly urged rearwardly bya spring 0*. This spring surrounds the rod between a knob or shoulderthereof and a bearing o, in which the rod is guided. The clutch-head isdisengaged from the eccentric by a sliding wedge p, arranged at rightangles to the axis of the head and adapted to bear against the beveledannular face p thereof. This wedge is guided in a horizontal socket p2,arranged on the adjacent standard H, and is operated by a hand-lever p3,connected to the rear end of the wedge. The wedge may be locked in itsoperative position by a pin p4, passed through holes in the same and itssocket, as shown in Fig. 5, or by any other suitable means.

In order to permit the stroke of the helve to be varied, the eccentricis preferably adjustable on its shaft for changing its throw. In theconstruction shown in the drawings, this adjustment is obtained byproviding the eccentric with an elongated opening or radial slot Q,through which the shaft g2 passes and which permits the eccentric to beshifted radially on the shaft. The-eccentric is adjustably secured tothe inner side of a head R by transverse clamping-bolts r, carried bysaid head and passing through slots r', arranged in the eccentric onopposite sides of its central slot q and parallel therewith. Theeccentric may also be provided with guide-ribs r2, arranged parallelwith its slotsand engaging in corresponding grooves r3, formed in theinner side of the supporting-head. These ribs relieve the bolts fromshearing strains. The supporting-head is free to turn on the shaft g2,but is held against lateral displacement thereon by aset-screw s passingthrough its hub and engaging in an annular grooves', formed in theshaft, as shown in Fig. 10. Upon loosening the clamping-bolts r theeccentric can be adjusted radially on the supporting-head R, the boltsbeing again tightened after elfecting the desired adjustment. Theclutch-teeth a3 a* are of sufficient width to engage with each otherthroughout the range of adjustment of the eccentric.

The cutters J may be of any suitable construction, but are preferably V-shaped in cross-section, with their apexes facing forwardly, as shown inFig. 16, and are provided with pointed ends formed by beveling thecutters on their rear sides.

The machine is preferably provided with suitable means for preventing itfrom running downhill in case the worm f should beY thrown out of gearon a comparatively steep grade. The arresting devices shown in thedrawings consist of a pair of oppositely-disposed detent-pawls t t,pivoted to the upper end of the post C and adapted to interlock,respectively, with concentric ratchet-rims t2 t3, formed at the upperend of the sprocketwheel f2. When both of these pawls are in engagementwith the sprocket-wheel, they lock the same against turning and preventrotation of the rear axle A in either direction. l/Vhen the machine isto be used, the pawls are thrown out of engagement with thesprocket-wheel f2.

The operation of the machine is as follows: In `transporting the machinethe worm f is thrown out of gear with the worm-wheel f and theaxle-driving belt e5 is left on its pulleys. The belts g3 g4 are shiftedupon their loose pulleys, andthe hand-levers p3 are swung forward towithdraw the clutch-heads n2 from the eccentrics N. The turn-table C andthe helves K now remain at rest, while motion is transmitted from themotor to the rear axle of the machine by one of the belts ce' and thebelt e5. When it is desired to operate the cutters J, the belt c5 isthrown off its pulleys, the worm f is moved into gear with the wormwheelf', and the eccentrics N are clutched to the shaft g2. The helves willnow be vibrated by the eccentrics, causing the cutters to penetrate theasphalt or other surface to be opel'- ated upon, and at the same timethe machine will be slowly advanced by the worm-gearing ff and thedriving-chain F, thus producing a greater or less number of parallellongitudinal cuts, according to the number of helves carried by themachine. To cause the cutters to make a transverse cut, the helves aremoved laterally in either direction by means of the turn-table C, whichlatter is operated automatically by shifting the driving-belts g3 g4upon their tight pulleys. Although the tools in making a transverse cutare moved in the arc of a circle by theturn-table, the slow forwardmovement of the machine largely compensates for the curvilinear movementof the IOO IIO

ISO

tools, causing the same to produce a practically straight transversecut. This compound motion of the tools enables the machine to cut outpieces of pavement of any desired outline as may be required by thenature of the repairs.

My improved machine, though especially desirable for cutting asphaltpavement, may also be used for tamping or ramming purposes inconstructing roads by simply substituting suitable tools for thecutters.

I claim as my invention* 1. In a machine of the character described, thecombination of a truck or support, a turntable arranged thereon, a helvemounted on the turn-table, a cutter carried by the helve, and means forvibrating the helve, substan- Ytially as set forth.

2. In a machine of the character described, the combination of a truck,a turn-table arranged thereon, a helve mounted on the turntable, acutter carried by the helve, means for vibrating the helve, andautomatic means for simultaneously operating the turn-table andpropelling the truck, substantially as set forth.

3. In a machine of the character described, the combination of a truck,a turn-table arranged thereon, a helve mounted on the turntable andcarrying a cutter, means for actuating the turn-table, and propellingmeans for the truck constructed and timed to substantially compensatefor the curvilinear movement of the cutter, substantially as set forth.

4. In a machine of the character described, the combination of a truck,a turn-table journaled thereon, a helve mounted on the turntable andcarrying a cutter, a motor, gearing for turning said table interposedbetween the same and the motor, gearing for propelling the truckinterposed between the motor and an axle of the truck, and means forconnecting and disconnecting the last-named gearing from said axle,substantially as set forth.

5. In a machine of the characterdescribed, the combination of a truck, aturn-table journaled thereon, av helve mounted on the turntable andcarrying a cutter, a motor carried by the turn-table,` actuating-shaftsfor the turn-table and the helve both mounted on the turn-table, andpower-transmitting means connecting said shafts with the motor,substantially as set forth.

6. In a machine of the character described, the combination of a truck,aturn-table journaled thereon, a helve mounted on the turntable andcarrying a cutter, a motor carried by the turn-table, actuating-shaftsfor the turn-table and the helve both mounted on the turn-table,power-transmitting means connecting said shafts with the motor, a thirdshaft driven by the motor and also mounted on the turn-table, andgearing' connecting the last-named shaft with an axle of the truck,substantially as set forth.

7. In a machine of the character described,

the combination of atruck and a motor mounted thereon, of worm-gearinginterposed between the motor and an axle of the truck, for slowlypropelling the truck, a turn-table journaled on the truck, worm-gearinginterposed between the motor and the turn-table, a movable tool mountedon the turn table, and means for actuating the tool, substantially asset forth.

8. In a machine of the character described, the combination of a truckor support carrying a fixed gear-wheel, a turn-table journaled on thetruck, a shaft carried by the turn-table and having a gear-wheel whichmeshes with said fixed wheel, means for turning said shaft, and amovable tool mounted on the turn-table, substantially as set forth.

9. In a machine of the character described, the combination of a truckhavingafixedstud or post, a gear-wheel secured to said stud, a turn-table journaled on the truck, a shaft mounted on the turn-table andhaving a gearwheel which meshes with said fixed gearwheel, a helvesupported on the turn-table and carrying a tool, an actuating-wheeljournaled on said stud, power-transmitting means connecting one of theaxles of the truck with said actuating-wheel, and driving means for theactuating-wheel,substantially as set forth.

10. In a machine of the character described, the combination of a truckor support having a stud or post, a worm-sector secured to said post, aturn-table journaled on the post, a shaft mounted on the turn-table andhaving a worm which meshes with said sector, a movable tool carried bythe turn-table, and means for actuating the tool, substantially as setforth.

11. In a machine of the character described, the combination of a truckor supporthaving standards, a sleeve or socket pivoted to saidstandards, a helve seated in said sleeve and capable of angularadjustment therein, and a tool carried by the helve, substantially asset forth.

12. In amachine of the character described, the combination of a truckor support having standards, a sleeve or socket pivoted to saidstandards, a helve seated in said sleeve and capable of angularadjustment therein, clamping-bolts for adjustably securing the helve inthe sleeve, and a tool carried by the helve, substantially as set forth.

13. In a machine of the character described, the combination of a truckor support having standards, a helve pivoted to said standards by avertically-movable fulcrum, means for adjusting' said fulcrum, a toolcarried by the helve, and actuating means for the helve, substantiallyas set forth.

14. In a machine of the character described, the combination of a truckor support having standards, vertically-movable bearing-boxes guided inthe standards, adjusting-screws connected with said bearing and eachprovided with a gear-Wheel, an idler connecting said gear-Wheels, ahelve having trunnions journaled in said bearing-boxes, and a toolcarried by the helve, substantially as set forth.

15. In a machine of the character described, the combination of a truckor support having standards, a helve pivoted to the standards andcarrying a tool, a driving-shaft carrying a sliding clutch member, andan actuating-eccentric for the helve mounted on said shaft, theeccentric and the clutch member being provided on their opposing sideswith clutchteeth arranged near the periphery thereof, substantially asset forth.

16. In a machine of the character described, the combination of a truckor support having standards, a helve pivoted to the standards andcarrying a tool, a driving-shaft carrying an eccentric capable of radialadjustment i thereon, and a strap surrounding 'the eccentric andconnected with the helve, substantially as set forth.

17. In a machineof the character described, the combination of a truckor support having standards, a helve pivoted to the standards andcarry'ing a tool, a driving-shaft having a head, an actuating-eccentricfor the helve carried by said head and capable of radial adjustmentthereon, and a clutch member rotating with the shaft and adapted toengage with the eccentric, substantially as set forth.

18. In amachine of the character described, the combination of a truckor support having standards, a helve pivoted to the standards andcarrying a tool, a driving-shaft having a head, an actuating-eccentricfor the helve having a radial slot through which the shaft passes, andmeans for clamping the eccentric to said head, substantially as setforth.

19. In a machine of the character described, the combination of a truckor support having standards, a helve pivoted to the standards andcarrying a tool, a driving-shaft having a loose head, anactuating-eccentric for the helve provided With a radial slot throughwhich said shaft passes, a clamping-bolt passing through the head and aslot in the eccentric, and a sliding clutch member carried by the shaftand adapted to interlock with the eccentric, substantially as set forth.

Vitness my hand this 11th day of October,

, HENRY SCHUMACHER. Witnesses:

C. F. GEYER, E. M. GRAHAM.

